Buttstock Kit, Complete
This is a complete buttstock kit including the Buffer Tube, Buffer, standard Buffer Spring, Castle Nut, Recevier End Plate, and Tapco-like stock. Convert a fixed-stock AR-15 to an M4 configuration or complete your stripped lower on the cheap.
The stock is collapsible and 6-position to meet the needs of different-sized shooters in a variety of shooting positions. This is ready to install on any AR-15 lower so long as the Upper Receiver's buffer tube threads are in spec.
Take your pick of a Mil-Spec (1.15") or Commercial size (1.17") Buffer Tube and matching Butt stock.
Stock is made from a tough injection-molded plastic. The stock interior diameter closely matches the buffer tube for a tight fit. The stock adjustment lever/button has lots of stroke to fit other applications if needed. The buffer tube is anodized aluminum for a long service life.
You get your choice of Buffer weight with this kit. If you don't know what to choose, most people start with a Standard 3oz. You can upgrade later if you feel you need more weight. Read more about our buffers here.
This kit is also available without the stock.
- Available in either Mil-Spec or Commercial size
- 6-position stock
- Flat-back Buffer Tube
- Buttstock has a bonus sling loop
- 6061 T6 Aluminum
- Both options have the highly sought-after 'raised threads'
- Weight varies, see table at the bottom of this page
- Six-position buffer tube
- Basic end plate
- Standard buffer spring
- Standard 3oz. buffer
- Castle nut
- Standard-spec AR-15/M16 lower receivers
- Works with plastic, aluminum and other metal lowers
Note: sometimes the castle nuts come from our supplier with rough threads, in which case we chase the threads with a bolt to smooth them out for you. It might look like the nut has been used but it's just our love marks.
Total kit weight for each configuration:
- Mil-Spec, with 3oz buffer - 469g
- Mil-Spec, with H buffer - 489g
- Mil-Spec, with H2 buffer - 519g
- Mil-Spec, with H3 buffer - 544g
- Commercial, with 3oz buffer - 509g
- Commercial, with H buffer - 529g
- Commercial, with H2 buffer - 559g
- Commercial, with H3 buffer - 584g